Easy-to-assemble trampoline

ABSTRACT

The present invention discloses an easy-to-assemble trampoline, which includes a flexible bouncing mat, a frame, and a plurality of flexible rods, the top end of the flexible rod is arranged at its periphery or its bottom of the flexible bouncing mat, and the bottom end of the flexible rod is retained on the frame. The top end of each flexible rod is fixedly mounted at the periphery or bottom of the flexible bouncing mat by a buckle structure; the buckle structure includes a mounting member, a flexible belt and at least one clamping member; one end of the flexible belt is fixed on the flexible bouncing mat, the clamping member is fixed on the flexible belt, and the mounting member is provided with a through hole; the flexible belt can pass through the through hole, and the clamping member holds the flexible belt at an outlet of the through hole.

TECHNICAL FIELD

The invention relates to a trampoline for sporting and/or recreationaluse, in particular, to an easy-to-assemble trampoline.

BACKGROUND

At present, the trampoline producers in the world are mainlyconcentrated in China, the United States, Germany and Japan, among whichBoard & Battern Inc. (KY) and Vuly PTY LTD are the most well-knownproducers hereof.

The basic structure of the trampoline includes a flexible bouncing mat,a frame, multiple flexible rods, multiple supporting legs, a protectivenet and multiple supporting rods. Each flexible rod has a top end and abottom end respectively. The top ends of the flexible rods are arrangedaround the flexible bouncing mat, and the bottom ends of the flexiblerods are fixed on the frame, so that the flexible bouncing mat is set upabove the frame. The frame is erected on the ground with the supportinglegs. The protective net is arranged at the periphery of the flexiblebouncing mat and extends upwards from the flexible bouncing mat to forma closed or semi-closed bouncing space. The protective net protects theusers who are doing bouncing jump on the flexible bouncing mat fromfalling off from the flexible bouncing mat. The supporting rods arearranged around the flexible bouncing mat to support and tension theprotective net.

Trampoline exercise is a healthy and interesting entertainment. Studieshave shown that trampoline exercise could not only exercise body andstrengthen muscle, but also helped people developing a sense of balanceand improving sports skills. With the development of technology,trampolines are entering people’s life more and more. At the same time,the defects of traditional trampolines are also exposed, such as:

1. The bending stiffness of the flexible rod of the traditionaltrampoline is 1200 N/m-3000 N/m. It takes a lot of effort to install theflexible rod, so it is difficult for the general public to install thetrampoline.

2. The installation structure of the top end and the bottom end of theflexible rod is complex, which can’t play an essential auxiliary role inthe installation of the flexible rod.

3. After the installation of trampoline, the elasticity of flexiblebouncing mat can’t be adjusted, which can’t meet the needs of differentusers.

4. The trampoline structure is not strong enough, it is easy to collapseand damaged.

5. It is difficult to produce and transportation.

Therefore, it is urgent to improve the structure of trampoline in orderto overcome the defects of the prior art.

SUMMARY

In order to overcome the shortcomings of the prior art, the presentinvention provides an easy-to-assemble trampoline, the installationstructure of flexible rod is improved, so that the installation oftrampoline is labor-saving and convenient, and the general users caninstall it by themselves. After the installation of trampoline, theelastic force of flexible bouncing mat can be adjusted to meet the needsof different users and increase the bouncing comfort. The safety oftrampoline is greatly improved.

The technical proposals of the present invention are as follows:

An easy-to-assemble trampoline includes a flexible bouncing mat, a frameand a plurality of resiliently flexible rods, each flexible rod having atop end and a bottom end respectively, the top end of each flexible rodis arranged at the periphery or at the bottom of the flexible bouncingmat, and the bottom end of each flexible rod is retained on the frame,so that the flexible bouncing mat is set up above the frame.

The top end of each flexible rod is fixedly mounted at the periphery orthe bottom of the flexible bouncing mat by a buckle structure; thebuckle structure includes a mounting member, a flexible belt and atleast one clamping member; one end of the flexible belt is fixed on theflexible bouncing mat, the clamping member is fixed on the flexiblebelt, and the mounting member is provided with a through hole; theflexible belt can pass through the through hole, and the clamping memberholds the flexible belt at an outlet of the through hole so that theflexible belt can’t be pulled back from the through hole; the top end ofeach flexible rod is fixedly contained in the mounting member.

The bottom of the mounting member is provided with an receiving groove,and the top end of the flexible rod is fixedly contained in thereceiving groove.

The mounting member has a pipe part and an expanded head arranged at thetop of the pipe part, the top of the flexible rod is inserted into thereceiving groove and fixed with the pipe part; and the expanded head isprovided with the through hole.

The clamping member has a short edge and a long edge, the length of theshort edge is less than the aperture of the through hole, and the lengthof the long edge is larger than the aperture of the through hole, sothat the clamping member can pass through the through hole and be heldat the outlet of the through hole along the long edge.

The flexible rod is a straight rod with a bending stiffness of 3000N/m~10000 N/m, the top end of the flexible rod is deflected 10 mm~290 mmfrom the natural straight state towards the center of the flexiblebouncing mat, so that the flexible rod is bent and installed at theperiphery or at the bottom of the flexible bouncing mat to support andtension the flexible bouncing mat.

A diameter of the flexible rod is 0.5 cm~3 cm, and a length of theflexible rod is 0.3 m~1.5 m.

The flexible rod is made from alloy aluminum.

The flexible bouncing mat has a length or width of 11 feet~20 feet.

The bottom end of the flexible rod is fixed and retained in the framethrough an installation structure.

The installation structure includes pairs of upper inserting holes on aupper side of the frame and lower inserting holes on a lower side of theframe, each pair of the upper inserting hole and the lower insertinghole are staggered settings; the bottom end of each flexible rod isinserted into a pair of the upper inserting hole and the lower insertinghole.

The installation structure also has a first sleeve corresponding to eachpair of the upper inserting hole and the lower inserting hole, the firstsleeve is inserted into a pair of the upper inserting hole and the lowerinserting hole, and the bottom end of the flexible rod is inserted intothe sleeve.

The hole diameter of the lower inserting hole is larger than thediameter of the bottom end of the first sleeve and less than thediameter of the main body of the first sleeve, thereby preventing thefirst sleeve from falling off from the lower inserting hole.

The installation structure also has an elastic member, the elasticmember is located between the upper inserting hole and the flexible rod,thereby adjusting the position of the flexible rod in the frame.

The upper inserting hole is arranged as an elliptical hole, and itsopposite two ends of the elliptical hole, named as A end and B endrespectively, are located on the inside and the outside of the upperside of the frame respectively; the elastic member is inserted into theA end or the B end, thereby adjusting the position of the flexible rodin the frame.

The frame is in a circle shape formed with several arc-shape steel pipesconnected at the beginnings and the tails of several curved steel pipes,the joint of the adjacent several arc-shape steel pipes is respectivelyprovided with a first plug-in cylinder and a first plug-in connectorwhich is matched with the first plug-in cylinder; the first plug-inconnector is inserted into the first plug-in cylinder and is fixedlyconnected therein by a nail pin.

The trampoline also includes a plurality of supporting structures, whichsupport the frame from the underneath of the frame so as to keep theframe maintain above the ground; the supporting structure is providedwith a horizontal rod, a first vertical rod and a second vertical rodwhich are arranged at two ends of the horizontal rod, and a thirdvertical rod which is arranged at the middle of the horizontal rod; thefirst vertical rod and the second vertical rod are respectively inclinedtowards the central direction of the flexible bouncing mat, and the topend of the first vertical rod and the top end of the second vertical rodare reversely bent. The frame is provided with matching cylindersmatched with the top end of the first vertical rod and the top end ofthe second vertical rod respectively.

The frame is provided with a second plug-in cylinder, which is arrangedat the extending direction of the third vertical rod, the top end of thethird vertical rod is inserted into the second plug-in cylinder.

The trampoline also includes several supporting rods evenly distributedaround the flexible bouncing mat; the first vertical rod is welded witha second sleeve, and the bottom end of the supporting rod is insertedinto the second sleeve. The outlet of the second sleeve is flat, and theshape and size of the bottom end of the support rod is matched with theoutlet of the second sleeve; the bottom of the second sleeve is arrangedas a cylinder shape, and the diameter of which is slightly smaller thanthe diameter of the outlet of the second sleeve.

The supporting rod is a long arc-shaped rod joined by two relativelyshort arc-shaped steel pipes; the joint of the two short arc-shapedsteel pipes is also provided with a second plug-in cylinder and a secondplug-in connector matched each other respectively, and the secondplug-in connector is inserted into the second plug-in cylinder, and thetwo are fixed and connected by a nail pin.

The easy-to-assemble trampoline of the present invention also includes aprotective net with the bottom of it arranged around the flexiblebouncing mat; the protective net extends upwards from the flexiblebouncing mat to form a closed or semi-closed bouncing space; a pluralityof supporting rods are disposed around the flexible bouncing mat tosupport the top of the protective net.

The tops of the supporting rods are provided with holes respectively,the upper part of the protective net is provided with a plurality ofupper net hooks, and each of the upper net hooks is inserted into one ofthe holes respectively; each of the buckle structures is provided with alower net hook; and all of the lower net hooks hook the lower part ofthe protective net.

The buckle structure is provided with a mounting member, the mountingmember has a pipe part and an enlarged head part arranged at the top endof the pipe part, the lower net hook is arranged on the pipe part, andthe lower net hook bends towards the center of the flexible bouncingmat.

The top of the protective net is also provided with a basketball frame;the basketball frame is fixed on one of the supporting rods; theprotective net is provided with a zipper door; and the frame is alsoprovided with a ladder.

The bottom of the protective net is connected with the periphery or thebottom of the flexible bouncing mat by zipper.

The beneficial effects of the invention are as follows: the bucklestructure connects the flexible rod and the flexible bouncing pad, theinstallation of trampoline can be easily realized, the installationsafety can be improved, and the elasticity of the trampoline can beadjusted.

The mounting structure includes the first sleeve, the first sleeve isinserted into the frame and used for receiving the bottom end of theflexible rod, so as to facilitate the installation of the flexible rod,and the frame structure is simplified and the production is convenient.An elastic member is also arranged in the frame, which adjusts theposition of the flexible rod inserted into the frame, thereby adjustingthe tension and elasticity of the flexible bouncing pad to meet theneeds of different users and improve the bounce comfort of the flexiblepad.

The supporting structure increases the stability of the trampoline andimproves the safety performance of the trampoline.

The bending stiffness of the flexible rod is 3000 N/m~10000 N/m.Although the bending stiffness is high, when installing, it only needsto deflect 10 mm~200 mm towards the center of the flexible pad. Theinstallation is labor-saving. Ordinary consumers can install itthemselves, it reduces the difficulty of trampoline installation andimproves the safety of the installation. The bending stiffness of theflexible rod is 3000 N/m~10000 N/m, which is not easy to fatigue and hasgood elastic recovery ability. It can keep the flexible bouncing pad inthe tension state and increase the balance performance of thetrampoline.

By setting the upper hook and the lower hook to hook the upper part andthe lower part of the protective net respectively, the protective net isfixed and supported around the flexible pad and enclosed into a closedor unclosed space, which makes the installation and disassembly of theprotective net very convenient.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the trampoline according to the presentinvention.

FIG. 2 is a perspective view of the flexible rod according to thepresent invention.

FIG. 3 is a perspective view of the installation structure of thetrampoline according to the present invention.

FIG. 4 is a decomposition view of the installation structure of thetrampoline according to the present invention.

FIG. 5 is a perspective view of the first sleeve according to thepresent invention.

FIG. 6 is perspective view of the arc-shaped steel pipe 21 according tothe present invention.

FIG. 7 is a perspective view of the elastic member 27 according to thepresent invention.

FIG. 8 is another perspective view of the trampoline according to thepresent invention.

FIG. 9 is a perspective view of the buckle structure according to thepresent invention.

FIG. 10 is an enlarged view of the A of FIG. 8 , which shows anotherperspective view of the buckle structure according to the presentinvention.

FIG. 11 is a perspective view of the flexible rod is used in conjunctionwith the buckle structure and the first sleeve.

FIG. 12 is another perspective view of the trampoline according to thepresent invention.

FIG. 13 is another perspective view of the buckle structure according tothe present invention.

FIG. 14 is a decomposition view of the trampoline according to thepresent invention.

FIG. 15 is a perspective view of the supporting structure 40 and thesupporting rod 60 of the trampoline according to the present invention.

FIG. 16 is a perspective view of the second sleeve 45 according to thepresent invention.

FIG. 17 is another perspective view of the buckle structure according tothe present invention.

FIG. 18 is a decomposition view used in conjunction with the top of thesupporting rod according to the present invention.

FIG. 19 is another perspective view of the trampoline according to thepresent invention.

DETAILED DESCRIPTION OF EMBODIMENTS

The followings will further explain the present invention with theembodiments, which are the preferable embodiments according to thepresent invention.

Referring to FIG. 1 , the popular trampoline usually includes a flexiblebouncing mat 10, a frame 20 and a plurality of resiliently flexible rods30, each rod 30 has a top end 31 and a bottom end 32. The top end 31 ofthe flexible rod 30 is installed at the periphery or at the bottom ofthe flexible bouncing mat 10, and the bottom end 32 of the flexible rod30 is retained in the frame 20 so that the flexible bouncing mat 10 isset up above the frame 20. Under the pressure from the flexible bouncingmat 10, the flexible rods 30 are usually bent in a certain arc so as totension the flexible bouncing mat 10. The user can jump, play, andperform on the flexible bouncing mat 10. The flexible rods 30 arepreferably made from aviation alloy aluminum, glass fiber, or carbonfiber.

The flexible bouncing mat 10 is preferably in round shape, it also canbe other shape, such as a square, a pentagonal, a hexagonal, an oval,etc. The frame 20 is a circle formed by several arc-shaped steel pipes21 connected at the beginnings and the tails. Referring to FIG. 6 , thejoint of adjacent two arc-shaped steel pipes 21 is respectively providedwith a first plug-in cylinder 21 a and a first plug-in connector 21 bwhich are matched to each other; the first plug-in connector 21 b isinserted into the first plug-in cylinder 21 a and connected therein by anail pin fixedly.

The frame 20 also can be placed on the ground, it is preferably placedon the supporting structure 40.

In order to support the flexible mat 10 and the user, the flexible rod30 generally needs to have certain bending resistance. Especially in theprocess of the installation of the flexible rods 30, the bottom end 32of each flexible rod 30 is usually fixed on the frame 20 first, then thetop end 31 of the flexible rod 30 is deflected from the naturalstraightening status to bend towards the center of the flexible mat 10,so that the flexible rods 30 can support and tension the flexible mat 10to meet the requiring elasticity of bouncing jump.

In the prior art, the bending stiffness of the flexible rod 30 isgenerally less than 3000 N/m. This requires that the top end 31 of theflexible rod 30 deflects 300-450 mm towards the center of the flexiblebouncing mat 30 from the natural straightening status when it has notbeen connected to the edge of the flexible bouncing mat 10, in order tosupport the flexible bouncing mat 30 and make the elasticity of theflexible bouncing mat 30 meet the requirements of the trampoline. Thebending stiffness of flexible rod 30 in the prior art is too low,resulting in poor elastic recovery ability and easy to be bent. Afterthe trampoline is used for a period of time, the flexible rods 30 can’tbe restored to the original position so that the flexible bouncing mat10 no longer maintains at its tension state, its structure is relaxed,and its elasticity is decreased. In addition, when the bending stiffnessof the flexible rod 30 is less than 3000 N/m, the maximum size of theflexible bouncing mat 10 can only be 13 feet. Otherwise, the elasticityof the flexible bouncing mat 10 can’t meet the requirements.

The applicant has found that the flexible rod 30 with improved bendingstiffness can overcome the above-mentioned defects. When the flexiblerod 30 is a straight rod with bending rigidity of 3000 N/m~10000 N/m,the bottom end 32 of the flexible rod 30 is retained on the frame, andthe top end 31 of the flexible rod deflects 10 mm~200 mm from thenatural straight state to bend towards the center of the flexiblebouncing mat 10, so that the flexible rod 30 is bent and installed atthe periphery or at the bottom of the flexible bouncing mat 10 tosupport and tighten the flexible bouncing mat 10. If the bendingstiffness of the flexible rod 30 is 3000 N/m~10000 N/m, the elasticrestoring force of the flexible rod 30 increases and the flexible rod isnot easy to fatigue and deform. Although the bending stiffness of theflexible rod increases, the distance of deflection towards the center ofthe flexible bouncing mat is reduced, which makes the installation ofthe flexible rod easier.

At present, the material of the flexible rod in the market is glassfiber or carbon fiber. The glass fiber has good corrosion resistance,insulating property, heat-insulating property and high strength etc.However, the hardness of the glass fiber is high, combined with itsinherent brittleness, the glass fiber has the defects of no bendingresistance, poor abrasion resistance, poor flexibility and the likes. Ifthe glass fiber rod is used repeatedly for a long time or used in thelow-temperature state, it is easy to crack and lose its originalelasticity. Sometimes it is broken, resulting in trampoline damage.There is a potential safety hazard. In addition, according to the listof carcinogens published by the World Health Organization InternationalCancer Research Agency on 27 Oct. 2017, glass fiber is listed as anunsafe material.

Preferably, the material of the flexible rod 30 according to the presentinvention is aluminum alloy. Aluminum alloy weights light, its surfacecan be oxidized, it has better wind resistance and stronger compressivecapacity than glass fiber, and it also has good strength, toughness,fatigue resistance and plasticity, not easy to break. Even if thepressure exceeds its upper limitation, the aluminum alloy rod does notbreak, but increases the curvature. It will not cause trampoline todamage, thereby improving the safety of trampoline.

Preferably, the diameter of the flexible rod is 0.5 cm~3.0 cm.

Preferably, the length of the flexible rod is 0.3 m ~1.5 m.

When the bending stiffness of the flexible rod is 3000 N/m~10000 N/m,the diameter of the flexible bouncing mat is 11 feet~20 feet.

Referring to FIG. 3 and FIG. 4 , the bottom end 32 of the flexible rod30 is fixed and retained on the frame 20 by an installation structure.The installation structure includes pairs of upper inserting holes 24provided on the upper side of the frame 20 and lower inserting holes 25provided on the lower side of the frame 20. And each pair of the upperinserting hole 24 and the lower inserting hole 25 are disposed instagger. The bottom end 32 of the flexible rod 30 is inserted obliquelyinto the upper inserting hole 24 and the lower inserting hole 25.

The installation structure also includes a first sleeve 26 correspondingto each pair of the upper inserting hole 24 and the lower inserting hole25. The first sleeve 26 is inserted into the upper inserting hole 24 andthe lower inserting hole 25. The bottom end of the flexible rod 30 isinserted into the first sleeve 26.

Referring to FIG. 3 , FIG. 4 and FIG. 5 , in order to prevent the firstsleeve 26 from falling off from the lower inserting hole 25, thediameter of the bottom end 262 of the first sleeve 26 is less than thediameter of the main body 261 of the first sleeve 26. In particularly,the hole diameter of the lower inserting hole 25 is larger than thediameter of the bottom end 262 of the first sleeve 26 but less than thediameter of the main body 261 of the first sleeve 26, thereby preventingthe first sleeve 26 from falling off from the lower inserting hole 25.

Further, the top end 263 of the first sleeve 26 is provided with agradually broaden outlet in the extending direction so as to facilitatethe insertion of the bottom end 32 of the flexible rod 30.

When the bottom end 32 of the flexible rod 30 is installed, the firstsleeve 26 is inserted into a pair of the upper inserting hole 24 and thelower inserting hole 25 firstly, then the bottom end 32 of the flexiblerod 30 is inserted directly into the first sleeve 26. Or the bottom end32 of the flexible rod 30 can be inserted directly into the first sleeve26 firstly, and then the two are inserted into a pair of the upperinserting hole 24 and the lower inserting hole 25. The installation issimple and convenient.

It should be understood that when the bottom end 32 of the flexible rod30 and the first sleeve 26 are inserted into the lower inserting hole25, the bottom end 32 of the flexible rod 30 is fixed in the frame 20.When all of the top ends 31 of the flexible rods 30 are installed aroundthe flexible bouncing mat 10, the installing position of the top ends 31of the flexible rods 30 remain unchanged, and the tension and elasticityof the flexible bouncing mat 10 are maintained constant.

Referring to FIG. 3 , FIG. 5 and FIG. 7 , an elastic member 27 is alsoarranged in the upper inserting hole 24. The elastic member 27 islocatedbetween the upper inserting hole 24 and the flexible rod 30 so as toadjust the position of the flexible rod 30. Preferably, the upperinserting hole 24 is arranged as an elliptical hole, and the oppositetwo ends of the elliptical hole, named as A end and B end respectively,are located on the inside and the outside of the upper side of the frame20 respectively. The elastic member 27 is placed at the A end or the Bend so as to adjust the position of the flexible rod 30 in the frame 20,so that the tension and the elastic force to the bouncing mat 30 areadjusted. Concretely, when the bottom end 32 of the flexible rod 30 andthe first sleeve 26 are inserted into the upper inserting hole 24 andthe lower inserting hole 25, the elastic member 27 is placed at the Aend, that is a position close to the inside of the upper side of theframe 20, and the flexible rod 30 and the first sleeve 26 are squeezedto the B end, at this time, the flexible rod 30 exerts a greater tensionforce on the flexible bouncing mat 10 and the elastic flexible bouncingmat 30 has higher elasticity. When the elastic member 27 is placed atthe B end, that is a position close to the outside of the frame 20, theflexible rod 30 and the first sleeve 26 are squeezed to the A end, theflexible rod 30 exerts relatively smaller tension force on the flexiblebouncing mat 10, and the elasticity of the flexible bouncing mat 10 isreduced.

Preferably, referring to FIG. 6 , two limiting grooves 28 aresymmetrically arranged in middle of the hole wall of the upper insertinghole 24. Referring to FIG. 7 , the side surface of the elastic member 27adjacent closely to the first sleeve 26 is called as the inner side 271,the opposite other side surface of the elastic member 27 adjacentclosely to the hole wall of the upper inserting hole 24 is called as theouter side 272. Both of the inner side 271 and the outer side 272 arearranged as curved surface, the intersection of the two curved surfacesis provided with a clamping block 273, the clamping block 273 and thelimiting groove 28 are matched to each other and can hold each other.

Preferably, the intersection of the clamping block 273 and the outerside 272 is provided with an upper convex part 275. The bottom of theouter side 272 of the elastic member 27 is provided with an lower convexpart 274. When the elastic member 27 is inserted into the upperinserting hole 24, the upper convex part 275 and the lower convex part274 are holding the hole periphery of the upper inserting hole 24 fromthe upper direction and the lower direction respectively, therebypreventing it falling off from the upper inserting hole 24.

Preferably, referring to FIG. 1 , FIG. 8 and FIG. 11 , in order tofacilitate the installation of the top ends 31 of the flexible rods 30,a plurality of buckle structures 70 are arranged at the periphery or atthe bottom of the flexible bouncing mat 10. Each buckle structure 70 iscorresponded with one flexible rod 30 respectively, the top end 31 ofeach flexible rod 30 can be detachably installed in a predeterminedposition at the periphery or at the bottom of the flexible bouncing mat10. The installation manner is labor-saving and convenient. Referring toFIG. 3 , the buckle structure 70 includes a mounting member 71, aflexible belt 72 and at least one clamping member 73 fixed on theflexible belt 72. One end of the flexible belt 72 is fixed on the bottomof the flexible bouncing mat 10, the clamping member 73 is fixed on theflexible belt 72, and the mounting member 71 is provided with a throughhole 713; the flexible belt 72 and the clamping member 73 can passthrough the through hole 713. After the flexible belt 72 and theclamping member 73 are passed through the through hole 713, the clampingmember 73 is rotated to stuck at the outlet of the through hole 713 soas to prevent the flexible belt 72 from being pulled back from thethrough hole 713. The top end 31 of the flexible rod 30 is fixedlycontained in the mounting member 71, therefore the top end 31 of theflexible rod 30 is installed at a predetermined position of the flexiblebouncing mat 10.

Preferably, referring to FIG. 10 , in one embodiment of the presentinvention, the bottom of the mounting member 71 is provided with areceiving groove (not shown) in which the top end 31 of the flexible rod30 is fixedly disposed. Preferably, the receiving groove is arranged inan extending direction of the top end 31 of the flexible rod 30 so as tofacilitate the insertion of it. In the embodiment shown in FIG. 10 , themounting member 71 is similar to a cubic shape. It should be understoodthat the shape of the mounting member 71 is not limited to be the shapeas shown in FIG. 10 , it also can be spherical, polyhedral or any othershape. The present invention does not specifically limit the shape ofthe mounting member 71, and any change in the external shape of themounting member 71, without departing from the basic concept of thepresent invention, should be regarded in the scope of protection asdefined in the present invention.

Preferably, referring to FIG. 10 , FIG. 11 and FIG. 12 , the mountingmember 71 has a pipe part 711 and an expanded head 712 arranged at thetop end of the pipe part 711. The top end 31 of the flexible rod 30 isinserted into and fixed with the pipe part 711. The pipe part 711 isarranged in an extending direction of the top end 31 of the flexible rod30 so as to facilitate the insertion of the top end 31 of the flexiblerod 30. The expanded head 712 is provided with the through hole 713.

Referring to FIG. 10 , the size of the expanded head 712 is larger thanthat of the pipe part 711, thereby increasing the contact area betweenthe mounting member 71 and the flexible bouncing mat 10, which morefirmly supports the flexible bouncing mat 10.

Preferably, a baffle 714 is protruded on the outlet of the through hole723 of the expanded head 712. The baffle 714 can obstruct the clampingmember 73, thereby preventing the clamping member 73 from sliding andretracting from the through hole 723.

Concretely, referring to FIG. 10 , the expanded head 712 is similar to acubic shape, its bottom surface of the expanded head 712 is integratedwith the pipe part 711. The through hole 713 is arranged along its sidedirection of the expanded head 712 with a large end and a small endwhich is gradually decreased from the large end. The through hole 713 isa flat hole. Both of the flexible belt 72 and the clamping member 73 areflat shape, so that they can cooperate with the through hole 713 andpass through the through hole 713. Once the flexible belt 72 and theclamping member 73 are passed through the through hole 713, the clampingmember 73 is rotated to a certain angle to hold the clamping member 73at the outlet of the through hole 713.

Preferably, the clamping member 73 can pass through the through hole 713and is held on the outlet of the through hole 713. In one of theembodiment of the invention, the clamping member 73 has a short edge anda relatively long edge. The length of the short edge of the clampingmember 73 is slightly less than the aperture of the through hole 713,and the length of the long edge of the clamping member 73 is slightlylarger than the aperture of the through hole 713. Such configurationenables the clamping member 73 to pass through from one side of thethrough hole 713 to the other side, the clamping member 73 is rotatedafter it has passed through the through hole 713, and the clampingmember 73 can be held at the outlet of the through hole 713 along itslong edge.

It should be understood that the clamping member 73 matches with thethrough hole 713. For example, if the clamping member 73 is a longcylinder shape, the through hole 713 should also be a long cylindershape; if the clamping member 73 is a long cubic shape, the through hole713 must also be a long cubic shape. Referring to FIG. 9 , FIG. 10 andFIG. 13 , in one of the embodiment of the invention, the clamping member73 is provided as a thin piece. The through hole 713 is also arranged asa flat shape. Preferably,, the end of the clamping member 73 is providedwith a hook.

After the clamping member 73 is passed through the through hole 713, theclamping member 73 is held at the outlet of the hole 713, the flexiblebelt 72 is fixed and prevented from being retracted under the action ofpulling force, thereby fixing the top end of the flexible rod 30 at theperiphery or at the bottom of the flexible bouncing mat 10.

It should be understood that the positions of the clamping members 73 onthe flexible belts 72 must meet the design purpose of “installing thetop ends 31 of all the flexible rods 30 at the periphery or at thebottom of the flexible bouncing mat 10”. Therefore, the clamping member73 shall be installed at a suitable position on the flexible belt 72.The design purpose can’t be achieved if the clamping member 73 is toofar or too close to the flexible bouncing mat 10.

The flexible belt 72 is fixed on the flexible bouncing mat 10. It shouldbe understood that the flexible belt 72 can be fixed at the flexiblebouncing mat 10 in a variety of ways, for example, by welding, clamping,fastening, etc. In the preferred embodiment of the invention, theflexible belt 72 is sewn at the bottom of the flexible bouncing mat 10.

Referring to FIG. 11 , the mounting member 71 may be arranged directlyat the top end of the flexible rod 30. During the installation, thebottom end 32 of the flexible rod 30 is firstly inserted into the firstsleeve 26 of the frame 20, then the flexible belt 72 is passed throughthe through hole 723, and the top end 31 of the flexible rod 30 and themounting member 71 are pushed to a predetermined position at itsperiphery or at its bottom of the flexible bouncing mat 10, the clampingmember 73 is pulled out of the through hole 713, and the clamping member73 is rotated to be held at the outlet of the through hole 713.Therefore, the top ends 31 of the flexible rods 30 and the expandedheads 712 are assembled at the periphery or at the bottom of theflexible bouncing mat 10.

The mounting member 72 may also be directly installed onto the flexiblebelt 71. During the installation, the bottom end 32 of the flexible rod30 is firstly inserted into the first sleeve 26 of the frame 20, themounting member 72 is adjusted to the proper position of the flexiblebelt 71, the top end 31 of the flexible rod 30 is inserted into themounting groove or the tube part of the mounting member 72, the top end31 of the flexible rod 30 and the mounting member 72 are pushed to apredetermined position at its periphery or at its bottom of the flexiblebouncing mat 10, the clamping member 73 is pulled out from the throughhole 713, the clamping member 73 is rotated to be held at the throughhole 713, so the top end 31 of the flexible rod 30 and the head 722 areinstalled at its periphery or at its bottom of the flexible bouncing mat10.

In the structure of trampoline, a number of flexible rods 30 are evenlydistributed between the frame 20 and the flexible bouncing mat 10, andthus support the flexible bouncing mat 10 so that the force on theflexible bouncing mat 10 is balanced in all directions. In theinstallation process of trampoline, if multiple of the flexible rods 30are installed in sequence on the flexible bouncing mat 10, the side ofthe flexible bouncing mat 10, where hasn’t installed the flexible rods30, will be suffer uneven force, resulting in the difficulty ofinstalling the flexible rods on that side, and even affecting thestructure of the product. To resolve this shortcomings, referring toFIG. 12 and FIG. 13 , the number of the clamping member 73 on eachflexible belt 72 of the present invention is two, and the first clampingmember 73 is capable of installing the top end of the flexible rod 30and the head 722 in a pre-installed position, for example, its peripheryof the flexible bouncing mat. The second clamping member 73 is capableof installing the top end of the flexible rod 30 and the head 722 in theinstalling position, for example, the bottom of the flexible bouncingmat 10. During the installation, the bottom end 32 of the flexible rod30 is firstly fixed to the frame 20, the flexible belt 72 and the firstclamping member 73 are pulled to pass through the through hole 713 ofthe head 722, then the clamping member 73 is held at the through hole713, the top end 31 of the flexible rod 30 and the expanded head 712 aremounted in a pre-installed position, such as the periphery of theflexible bouncing mat 10. When all of the top ends 31 of the flexiblerods 30 are installed in the pre-installed position, the flexible belts72 are pulled sequentially so that the second clamping member 73 ispassed through the through hole 713 and is held at the outlet of thethrough hole 723, the flexible rods 30 are further bent, and the topends of the flexible rods 30 are thus mounted in the mounting position,that is, the bottom of the flexible bouncing mat 10.

Referring to FIG. 14 , In general, in order to facilitatetransportation, a circle shaped frame 20 is formed with severalarc-shape steel pipes 21 which are connected at the beginnings and thetails. The joint 28 of adjacent two of the steel pipes 21 is providedwith a first plug-in cylinder 21 a and a first plug-in connector 21 bwhich are matched to each other. The first plug-in connector 21 b isinserted into the first plug-in cylinder 21 a, and the two are fixed andconnected by a nail pin. In the structure of the trampoline, the bottomends of the flexible rods 30 are mounted on the frame 20, and the topends of the flexible rods 30 are arranged at the periphery of theflexible bouncing mat and thus support the flexible bouncing mat 10. Theflexible bouncing mat 10 presses the flexible rods 30 downward so thatthe flexible rods 30 are bent in the direction to the center of theflexible bouncing mat 10. During the installation of the trampoline,when one of the arc-shape steel pipe 24 is connected to the flexiblebouncing mat 10 by a plurality of flexible rods 30, the flexible rods 30are bent towards the direction of the center of the flexible bouncingmat 10 under the pressure, and the flexible rods 30 pull the arc-shapesteel pipe 21 upwardly towards the direction of the center of theflexible bouncing mat 10 so that the middle of each steel pipe 21 ishigher relatively to the both of its side ends, which will cause theadjacent steel pipes 21 to separate from each other or collapse from thejoint and destroy the stability of the frame 20.

Referring to FIG. 14 and FIG. 15 , the trampoline also includes aplurality of supporting structures 40, which support the frame 20 fromunderneath of the frame 20, so as to keep the frame maintained above theground. The supporting structure 40 is provided with a horizontal rod41, a first vertical rod 42 and a second vertical rod 43 which aresymmetrically arranged at two ends of the horizontal rod 41, and a thirdvertical rod 44 is arranged at the middle of the horizontal rod 41; thefirst vertical rod 42 and the second vertical rod 43 are respectivelyinclined to the central direction of the flexible bouncing mat 10, andthe top end 421 of the first vertical rod 42 and the top end 431 of thesecond vertical rod 43 are bent reversely.

The frame 20 is provided with matching cylinders 29 a, 29 c which arematched with the top end 421 of the first vertical rod 42 and the topend 431 of the second vertical rod 43 respectively. The installingdirection of the matching cylinders 29 a, 29 c on the frame 20 must bein the extending direction of the top end 421 of the first vertical rod42 and that of the top end 431 of the second vertical rod 43, so thatthe installation of the supporting structures 40 can be easily carriedout. Further, in order to achieve a stable installation, the matchingcylinders 29 a, 29 c are fixed with the top end 421 and the top end 431by nail pins 22.

After the first vertical rod 42 and the second vertical rod 43 areinserted into the matching cylinders 29 a, 29 c, the first vertical rod42 and the second vertical rod 43 apply force to the arc-shape steelpipe 21 in the direction opposite to that applied by the flexible rod30, thereby keeping the arc-shape steel pipe 21 in balance and avoidingthe arc-shape steel pipe 21 higher in the middle and lower at its bothends.

In order to more firmly support the frame 20, a second socket 23 isprovided at the joint 28 of the adjacent arc-shape steel pipes 21, thesecond socket 23 is located in an extending direction at the top end 441of the third vertical rod 44. The top end 441 of the third vertical rod44 is inserted into the second socket 23 to support the joint 28 of thearc-shape steel pipes 21 to prevent the adjacent arc-shape steel pipes21 from falling apart or collapsing from the joint 28.

A third insert cylinder 46 is provided at the middle of the horizontalrod 41, and the lower end 442 of the third vertical rod 44 is insertedinto the third insert cylinder 46, thereby facilitating the disassemblyand installation of the third vertical rod 44.

Referring to FIG. 14 and FIG. 15 , the trampoline also includes a numberof supporting rods 60 evenly distributed around the flexible bouncingmat 10. The first vertical rod 42 is welded with a second sleeve 45 atits bending position, the installing direction of the cylinder mouth 451of the second sleeve 45 is located in the extending direction of thebottom end 61 of the supporting rod 60, and the bottom end 61 of thesupporting rod 60 is inserted into the second sleeve 45. The cylindermouth 451 of the second sleeve 45 and the bottom end 61 of thesupporting rod 60 are matched to each other. Preferably, the cylindermouth 451 of the second sleeve 45 is arranged as a flat mouth. Forexample, the cylinder mouth 451 of the second sleeve 45 is an ellipticalflat mouth, and the bottom end 61 of the supporting rod 60 is alsoelliptical. When the cylinder mouth 451 of the second sleeve 45 is inrectangular shape with long flat port, the bottom end 61 of the supportbar 60 is also in rectangular shape with long flat port. The flat portcan prevent the supporting rod 60 from rotating, thereby increasing thestability of the supporting rod 60.

Further, referring to FIG. 16 , the bottom of the second sleeve 45 isprovided as a cylinder 452 having a diameter slightly smaller than thediameter of the cylinder mouth 451. After the bottom end 61 of thesupporting rod 60 is inserted into the cylinder mouth 451, it is alsopossible to squeeze the bottom end 61 into the cylinder 452 under theaction of pressure. Since the diameter of the cylinder 452 is slightlysmaller than the diameter of the bottom end 61, the bottom end 61 willbe tightly wrapped and the binding force of the two is increased, sothat the bottom end 61 cannot be easily removed from the second sleeve45, thereby further increasing the mounting stability of the supportingrod 60.

Preferably, the supporting rod 60 is a long arc-shaped rod jointed bytwo relatively short arc-shaped steel pipes 62; a second plug-incylinder 621 and a second plug-in connector 622 matched with the secondplug-in cylinder 621, are also provided at the joint of the two shortarc-shaped steel pipes 62 respectively, and the second plug-in connector622 is inserted into the second plug-in cylinder 621, and the two arefixed and connected by the nail pin 63. Using two short arc-shaped steelpipes 62 to be jointed to form a long arc-shaped rod is convenient fortransport the supporting rods 60. The plug-in manner of connecting thetwo short arc-shaped steel pipes 62 by the nail pin 63 makes theassembly easy and the structure stable.

Preferably, the structure of the second plug-in cylinder 621 is the sameas that of the mouth of the second sleeve 45. The structure of thesecond plug-in connector 622 is the same as that of the bottom end 61 ofthe supporting rod 60, which provide the same function and technicaleffect as that the bottom end 61, which is not repeated herein.

Referring to FIG. 17 , the trampoline also includes a protective net 80with its bottom arranged around the flexible bouncing mat 10. Theprotective net 80 extends upwards, its top of the protective net 80 issupported by a plurality of the supporting rods 60 disposed evenlyaround the periphery of the flexible bouncing mat 10 and thus forming aclosed or semi-closed space for bouncing jump.

The lower part of the protective net 80 is fixed and installed aroundthe flexible bouncing mat 10 by a plurality of lower net hooks 81 whichare hooked through the mesh at the lower part of the protective net 80.In this way, it is very convenient to install and disassemble theprotective net 80.

The lower mesh hooks 81 can be arranged on the buckle structure 70, oron the frame 20, or on the installation structure, or on the peripheryof the flexible bouncing mat 10. The position of the lower hooks 81 aredesigned mainly according to the consideration of the convenience ofproduction and the appearance of the trampoline. Preferably, the lowerhooks 81 are provided on the pipe parts 711 of the buckle structures 70.This design enables the lower hooks 81 to be produced by using the sameset of molds as for the mounting member 71, no additional molds areneeded, no extra production process needs to be added, which bringsgreat convenience to the production.

It should be understood that the convenience described above can also beobtained by setting the lower hooks 81 on the frame 20 and on thesupporting structures 40. But the drawback of this design is that itwill increase the length of the protective net and affect the outlook ofthe trampoline.

Further, the lower hooks 81 are arranged as facing the center positionof the flexible bouncing mat 10 so as to prevent it from hovering otherobjects or scratching the user.

An inserting hole 65 is provided at the top end of each supporting rod,a plurality of upper hooks 82 are provided at the upper part of theprotective net 80, and the upper hooks 82 are thus inserted into theinserting holes 65 respectively to support the protective net 80. Thedesign makes the installation and disassembly of the upper part of theprotective net 80 convenient.

Referring to FIG. 18 , the upper hook 82 is a “7” glyph, L-shaped,U-shaped, V-shaped, and so on. It should be understood that the shape ofthe upper hook 82 is not limited to the listed categories.

One end of the upper hook 82 is fixed and connected to the protectivenet 80, the other end of the upper hook is an inserting end 83, which isinserted into the inserting hole 65. The inserting end 83 can bearranged as a shrapnel and is flexibly matched with the inserting hole65.

An inserting member is provided at the top of the supporting rod 60, theinserting member has a sphere 67, a fixing member 68 extending from thebottom of the sphere 67. The fixing member 68 is inserted into the topof the supporting rod 60, and is fixed therein by a screw. The insertinghole 65 is arranged in the sphere 67.

Referring to FIG. 19 , the top of the protective net 80 is also equippedwith a basketball frame 85. The basketball frame 85 is fixed on one ofthe support rods 60.

The protective net 80 of the trampoline is provided with a zipper door84. The frame 20 is also provided with a ladder 86.

Preferably, the lower part of the protective net 80 is connected withthe periphery or the bottom of the flexible bouncing mat 10 by zippers.

The above is a further detailed description of the invention incombination with a specific preferred embodiment, and it can’t beconcluded that the specific implementation of the invention is limitedto these instructions. For the general technical personnel in thetechnical field to which the invention belongs, without being separatedfrom the conception of the invention, the architecture form can beflexible and changeable, and a series of products can be derived. If itis just making a number of simple deductions or substitutes should beregarded as falling within the scope of patent protection determined bythe claim submitted by the present invention.

1. An easy-to-assemble trampoline, comprising: a flexible bouncing mat;a frame; and a plurality of resiliently flexible rods with a top end anda bottom end of each flexible rod, said top end of said flexible rod isarranged at a periphery or at a bottom of said flexible bouncing mat,and said bottom end of flexible rod is retained on said frame, therebysaid flexible bouncing mat is set up above said frame; said flexible rodis a straight rod with bending stiffness of 1000 N/m~10000 N/m, said topend of said flexible rod can be deflected 10 mm~90 mm from naturalstraight state towards a center of said flexible bouncing mat, so thatsaid flexible rod is bent and installed at said periphery or at saidbottom of said flexible bouncing mat to support and tension saidflexible bouncing mat.
 2. The easy-to-assemble trampoline according toclaim 1, wherein said bottom end of said flexible rod is fixed andretained in said frame by an installation structure; said installationstructure includes pairs of upper inserting holes on an upper side ofsaid frame and corresponding lower inserting holes on a lower side ofsaid frame, each pair of said upper inserting hole and said lowerinserting hole are staggered; said flexible rod is inserted into a pairof said upper inserting hole and said lower inserting hole respectively.3. The easy-to-assemble trampoline according to claim 1, wherein saidinstallation structure also has a first sleeve corresponding to eachpair of said upper inserting hole and said lower inserting hole, saidfirst sleeve is inserted into a pair of said upper inserting hole andsaid lower inserting hole, and said bottom end of said flexible rod isinserted into said first sleeve.
 4. The easy-to-assemble trampolineaccording to claim 3, wherein a diameter of said lower inserting hole islarger than a diameter of a bottom end of said first sleeve and lessthan a diameter of a main body of said first sleeve, thereby preventingsaid first sleeve from falling off from said lower inserting hole. 5.The said easy-to-assemble trampoline according to claim 2, wherein saidinstallation structure also has an elastic member, said elastic memberis located between said upper inserting hole and said flexible rod,thereby adjusting a position of said flexible rod in said frame.
 6. Theeasy-to-assemble trampoline according to claim 5, wherein said upperinserting hole is arranged as an elliptical hole, opposite two ends ofsaid elliptical hole, named as A end and B end respectively, are locatedon an inside and an outside of said upper side of said framerespectively; said elastic member is placed into said A end or said Bend, thereby adjusting said position of said flexible rod in said frame.7. The easy-to-assemble trampoline according to claim 1, wherein adiameter of said flexible rod is 0.5 cm-3 cm, and a length of saidflexible rod is 0.3 m~1.5 m.
 8. The easy-to-assemble trampolineaccording to claim 1, wherein said flexible rod is made from alloyaluminum.
 9. The easy-to-assemble trampoline according to claim 1,wherein said frame is a circle formed with several arc-shape steel pipesconnected at beginnings and tails of said arc-shape steel pipes; a jointof adjacent said arc-shaped steel pipes is provided with a first plug-incylinder and a first plug-in connector matched with said first plug-incylinder; said first plug-in connector is inserted into said firstplug-in cylinder and fixedly connected therein by a nail pin.
 10. Theeasy-to-assemble trampoline according to claim 1, wherein saidtrampoline also includes a plurality of supporting structures, whichsupport said frame from underneath of said frame so as to keep saidframe maintained above a ground; each of said supporting structure isprovided with a horizontal rod, a first vertical rod and a secondvertical rod which are arranged at two ends of said horizontal rod, anda third vertical rod is arranged at a middle of said horizontal rod;said first vertical rod and said second vertical rod are respectivelyinclined toward a central direction of said flexible bouncing mat, and atop of said first vertical rod and a top of said second vertical rod arereversely bent, said frame is provided with matching cylinders whichmatching with said top of said first vertical rod and said top of saidsecond vertical rod respectively.
 11. The easy-to-assemble trampolineaccording to claim 1, wherein said trampoline also includes severalsupporting rods evenly distributed around said flexible bouncing mat;said first vertical rod is welded with a second sleeve, and a bottom endof each of said supporting rod is inserted into said second sleeve; anoutlet of said second sleeve is flat, and said bottom end of saidsupport rod is matched with said second sleeve; a bottom of said secondsleeve is arranged as a cylinder, and a diameter of said cylinder isslightly smaller than a diameter of said outlet of said second sleeve.12. The easy-to-assemble trampoline according to claim 11, wherein eachof said supporting rod is a long arc-shaped rod formed by two shortarc-shaped steel pipes jointed together; a pair of second plug-incylinder and a second plug-in connector matched each other are alsoprovided at a joint of said two short steel pipes respectively, saidsecond plug-in connector is inserted into said second plug-in cylinder.13. The easy-to-assemble trampoline according to claim 1, wherein saidtrampoline also includes a protective net with a bottom of saidprotective net arranged around said flexible bouncing mat, saidprotective net extends upwards, a top of said protective net issupported by a plurality of supporting rods disposed around saidflexible bouncing mat, so as to form a closed or unclosed space forbouncing jump; said bottom of said protective net is connected to saidperiphery or said bottom of said flexible bouncing mat by zippers. 14.The easy-to-assemble trampoline according to claim 13, wherein a top ofeach said supporting rod is provided with an inserting hole, an upperpart of said protective net is provided with a plurality of upper hooks,and said hooks are inserted into said holes respectively; each of saidbuckle structures is provided with a lower hook; and all of said lowerhooks hook said protective net at a lower end of said protective net.15. The easy-to-assemble trampoline according to claim 14, wherein a topof said protective net is also provided with a basketball frame; saidbasketball frame is fixed on one of said supporting rods; saidprotective net is provided with a zipper door; and said frame is alsoprovided with a ladder.